Although most people acknowledge the importance of learning for improving performance in the water, sanitation and hygiene (WASH) sector, in practice key information and knowledge are too often not (or only partly) used for the planning and implementation of interventions.

“The story is now published. Your expertise was very helpful in sorting between the claims of the different parties, but I unfortunately didn’t end up quoting you directly due to space constraints,” Jeremy Weber, News Editor Christianity Today magazine wrote on 6 October 2011 in response to a reply...